Most Affordable DFPM
The 4iiii PRECISION is one of the most affordable, ready to ride direct force power meters available.
4iiii PRECISION Power Meter For Shimano XTR M9000
February 24, 2023$349.99
4iiii’s accuracy and innovation paired with Shimano’s top end XTR group set
4iiii PRECISION Power Meter For Shimano XTR M9000
The 4iiii PRECISION Power Meter for Shimano XTR M9000 is the lightest, most affordable direct force power meter available. The added weight of the 4iiii PRECISION is only 9 grams and it is accurate to within +/- 1.0%.
The 4iiii PRECISION is a left-only crank arm-based power meter and replaces your current left side crank arm. The 4iiii takes the power that is generated by your left leg and doubles it in order to determine your total power output.
In addition to being affordable, lightweight and highly accurate, the 4iiii PRECISION measures precise cadence data, has 3D power meter technology capable of measuring tri-axial strain and is compatible with both ANT+ and Bluetooth SMART devices.
Highlights
High Level of Accuracy
The PRECISION is accurate to within +/- 1.0%. This compares to average accuracy of +/- 1.0-2.0% for most other power meters.
Lightest Power Meter
At only 9 grams of added weight, the PRECISION is the lightest power meter you can buy!
Easy to Install
Installation is a breeze. Just swap it out for your current left-side crank arm and you’re ready to ride! Installation takes minutes…not hours.
ANT+ & Bluetooth SMART
The power meter transmits data via both ANT+ and Bluetooth SMART so you can use it with a wide range of devices.
Options
The power meter is available in the following crank arm lengths: 170 mm
Compatibility
Crankset: The 4iiii power meter is compatible with XTR M9000/9020/9030 cranksets. It is also compatible with all other Shimano x000/x020/x030 series MTB cranksets such as the XT M8000/M8020/M8030 or the SLX M7000/7020/7030.
It is not compatible with the newer x100 series cranks such as the XTR M9100, XT M8100 or SLX M7100.
Check Frame Clearance: Crank-arm based power meters like this one attach a sensor on the inside of the left crank arm. On some bikes, there is not enough room between the left crank arm and the chainstay for the sensor to clear the frame. Therefore, you should make sure you have at least 10 mm of clearance between the left crank arm and the chainstay - and that you don't have a bottom bracket mounted rear brake (used on some aero and TT bikes). The important area to measure is right in the middle of the crank arm. Please refer to the image below.
If you find that you have around 7-9 mm of clearance, what many people will do is simply install a 1 or 2 mm bottom bracket spacer (between the left crank arm and the frame), which will give them the clearance they need.
4iiii PRECISION Shimano XTR M9000 Specs
| Name | 4iiii PRECISION 2 XTR M9000 |
| Bike Type | MTB |
| Location of Power Measurement | Crank Arm |
| Left or Both Legs Measured | Left only |
| Independent Left/Right Measurement | No |
| Installation | Easier |
| Crank Arm Material | Aluminum |
| Communication Protocol | ANT+ and Bluetooth SMART |
| Claimed Accuracy | +/- 1.0% |
| Automatic Temp. Compensation | Yes |
| Weight | 9 grams (added weight) |
| Battery Type | CR2032 coin cell |
| Battery Life | 100 hours |
| Method of Cadence Measurement | Accelerometer |
| Warranty | 3 years |
In the Box
- 4iiii PRECISION Power Meter
- CR2032 coin cell battery
Tools Needed for Installation
You will need the following tools for installation of this product. You can purchase many of these commonly used tools in our store.
- Shimano Crank Arm Cap Tool
- 5 mm Allen key
Common Questions and Answers
Question: How do I determine what length my current cranks are so I can make sure I get the same size?
- Your crank arm length should be printed or stamped on the inside of the left crank arm, usually near the pedal end.
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